1261725 has 12 divisors (see below), whose sum is σ = 2086176. Its totient is φ = 672880.

The previous prime is 1261721. The next prime is 1261739. The reversal of 1261725 is 5271621.

It is not a de Polignac number, because 1261725 - 2² = 1261721 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1261695 and 1261704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1261721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8337 + ... + 8486.

It is an arithmetic number, because the mean of its divisors is an integer number (173848).

2^1261725 is an apocalyptic number.

1261725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1261725 is a deficient number, since it is larger than the sum of its proper divisors (824451).

1261725 is a wasteful number, since it uses less digits than its factorization.

1261725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16836 (or 16831 counting only the distinct ones).

The product of its digits is 840, while the sum is 24.

The square root of 1261725 is about 1123.2653292967. The cubic root of 1261725 is about 108.0574968194.

It can be divided in two parts, 1 and 261725, that added together give a triangular number (261726 = T₇₂₃).

The spelling of 1261725 in words is "one million, two hundred sixty-one thousand, seven hundred twenty-five".